Hello,
We are having some problems with the alignment of some inlet and outlet ports on a low pressure water conditioning "vessel". It is not build to vessel code, but I was wondering if there is either a standard or a "rule of thumb" tolerance for inlet/outlet port alignment. Our units with...
Update:
I have discovered a note in the detailing section of a Pressure Vessel Handbook that says they should be "Alignment A". Also, after talking to our welders, changing our jigs will not be a big deal as they already use a modular type system for different size flanges.
In conclusion, I...
Thanks, vesselfab. That is the general consensus I seem to be getting.
I'm also discovering it is much easier to prove that something meets a standard, then to prove there is no standard for something. How do you prove that something doesn't exist?!?
Does anyone know much about ASME B31...
PSE, I'm not sure I understand what you are saying. To be clear, both alignment A and B are the exact same flange, both with a single radius bolt circle.
I am asking about the alignment of the fitting (a weldneck flange for example) when welded to a chamber.
I disagree. The standard refers to the flanges & fittings only, and does not mention weldments at all. The way I see it, the standard refers to the central axis of the fitting (& flange) and therefore as long as pairs of holes are 180degs apart, they straddle the centerline of the fitting.
As...
Yes, thank you. I have ASME B16.5 and have looked through it.
After you mentioned it though, I've taken another look. The only reference to bolt hole location though is (am I allowed to quote this here?):
6.5: Flange Bolt Holes
Bolt holes are in multiples of four. Bolt holes shall be...
So, that sounds like either there is no ANSI standard, more an industry standard (two holed) and occasionally people deviate (one holed) for some reason, or there is a standard (two holed) and occasionally people don't know about it or aren't subject to the standard.
Anybody know if there is an...
Hello,
We weld flanges onto water process cells, and I can not find a standard relating to the hole orientation. This relates mostly to 4 bolt flanges. Is there a standard orientation relative to the axis of the cell or chamber?
If so, can you tell me what the standard is and which of the...
Hello,
We are having a problem. We currently use a 316 lead screw in our water treatment reactors. We chose 316 for corrosion resistance, but we are having issues with our seals at the end of the chamber. Our seal supplier suggested having a harder material for the shaft and I am looking for...
Is there a max thickness or maybe a thickness v. torque curve where stainless would be an acceptable medium for the 'gap'?
Is coupling through stainless steel impractical? An external SS housing may be practical for us, but plastic would be a challenge.
Is it possible to have a magnetic coupling of a motor to a shaft through 0.800" 316SS? What would the torque limitation be?
We mfg. a 316SS vessel to process water, with an acme screw inside the chamber that performs a cleaning function. We are experiencing seal problems and the idea of...
